- During his Art Spotlight, a tab for 20px Jarvan IV can faintly be seen at the top.
- Later during the Art Spotlight, a tab is seen titled "blindmonk", which refers to Lee Sin.
- Maokai was designed by Volty.
- Maokai is an anagram for "I Am Oak".
- Maokai was named after an artist at Riot whose real name is Maokai.
- Maokai's look, sounds, and attitude can be linked to the Ents in The Lord of the Rings saga.
- Maokai is the first champion to be "born" on the Fields of Justice.
- Although design-wise there is no clue that Maokai is an Oriental character like 20px Xin Zhao. His name follows the Mandarin pinyin scheme like 20px Xin Zhao (while Lee Sin's name is of different scheme). The official Chinese vendor translates his name as 茂凯 which literally means "lush (vegetation)-triumphant".
- The rune spiral that is on Maokais' ult is the same rune that is attached to Xerath's chest.
- His /dance is a reference to the Harlem Globetrotters.
- Maokai shares a place with Poppy in having the highest base armor of any champion at level 18 (90 armor).
- Totemic Maokai is based on a totem, which is an animal or other natural figure that spiritually represents a group of related people such as a clan.
- Festive Maokai was only available during the Snowdown Showdown of 2011.
- Festive Maokai is based on the Christmas tree.
- Haunted Maokai was only avaliable during the Harrowing of 2012.
- Maokai is a tree from the Twisted Treeline that has become animated. He despises the existence that was thrust upon him as he felt it was a corruption of nature and so fights as a soldier of nature.
- Maokai despises humans and their chaotic use of magic.
- Although Maokai and Malphite have different attitudes regarding their being brought to life, Malphite stated that he is "...proud to call the Twisted Treant my ally", suggesting that these two elemental champions get along quite well despite their differences.